CN104478184A - Clean utilization method for municipal sludge - Google Patents
Clean utilization method for municipal sludge Download PDFInfo
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- CN104478184A CN104478184A CN201410701405.8A CN201410701405A CN104478184A CN 104478184 A CN104478184 A CN 104478184A CN 201410701405 A CN201410701405 A CN 201410701405A CN 104478184 A CN104478184 A CN 104478184A
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- sludge
- municipal sludge
- mud
- thiobacillus thiooxidant
- methanobacteria
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Abstract
The invention provides a clean utilization method for municipal sludge. According to the method, the municipal sludge is subjected to high-temperature anaerobic fermentation, then, a thiobacillus thiooxidans enriched bacterial solution is added for culture, and finally, the municipal sludge is dehydrated. By the clean utilization method for the municipal sludge, provided by the invention, biogas can be produced and prepared at an anaerobic digestion stage; after heavy metals are removed through thiobacillus thiooxidans treatment, the sludge can be fully decomposed; meanwhile, for municipal industrial sludge, in the case that the content of the heavy metals is in the range of exceeding the heavy-metal limit value, specified by the national sgricultural standard, by five times, the heavy metal removal effect is good, the removal ratio can reach 90-95%, the treated industrial sludge can fully meet the agricultural requirements of sludge, is made into all types of organic fertilizers, is applied to landscaping, agricultural use and the like and is used for increasing the content of organic matters in soil and improving the structure of the soil; whereas, for municipal domestic sludge, the heavy metal removal effect is more obvious.
Description
Technical field
The present invention relates to a kind of method of municipal sludge clean utilization.
Background technology
During 12,3,500 ten thousand ~ 6,000 ten thousand tons, the mud of municipal sewage plant of China daily output water ratio 80%.Municipal sludge contains abundant nitrogen, phosphorus, potassium and organic matter, and utilizing as organic fertilizer is one economically feasible and the most promising method of disposal the most, but the high density heavy metal wherein contained limits this method of disposal.
In existing specific resistance to filtration, mode is comparatively single.The mud that heavy metal content is low, the mode often through During High-Temperature Composting processes, be applied to afforestation and agricultural in.And the municipal sludge that heavy metal content is high, what generally adopt is that the modes such as burning, brickmaking are carried out, and recycling sludge availability is low, easily causes secondary pollution to environment simultaneously.To in the harmless treatment of sludge heavy-metal, go back the technique that neither one is applicable to mass-producing process at present.
The method of municipal sludge clean utilization of the present invention, can fully utilize different cities mud.Remove the comprehensive treating process of heavy metal by preparing biogas and thiobacillus thiooxidant to the thermophilic digestion of mud, the clean utilization to mud can be reached.
Summary of the invention
The invention provides a kind of method of municipal sludge clean utilization, its objective is the comprehensive treating process all kinds of municipal sludge being carried out to mass-producing, enable to reach clean utilization.On the one hand in the anaerobic digestion of municipal sludge continuous high temperature, to large to the greatest extent degree ground minimizing, the completely harmless treatment of municipal sludge, produce the utilization that biogas carries out clean energy simultaneously; On the other hand, by thiobacillus thiooxidant removing sludge heavy-metal, accomplish, to the farthest recycling of municipal sludge, to eliminate the secondary pollution caused environment simultaneously.
The method of a kind of municipal sludge clean utilization provided by the invention is after municipal sludge is carried out high-temperature anaerobic fermentation, adds thiobacillus thiooxidant enrichment bacterium liquid and cultivates, finally, by dehydrating municipal sludge.
Preferably, step is as follows:
1) three grades are carried out to high temperature anaerobic methanobacteria and expand numerous cultivation;
2) by expand numerous after be in growth logarithmic phase high temperature anaerobic methanobacteria bacterium liquid add in municipal sludge, carry out high-temperature anaerobic fermentation.
3) three grades are carried out to thiobacillus thiooxidant and expand numerous cultivation, obtain thiobacillus thiooxidant enrichment bacterium liquid;
4) when flora number reaches 20-30 hundred million/L in thiobacillus thiooxidant enrichment bacterium liquid, added in the mud after step (2) fermentation, added sulphur powder, after cultured continuously 3-5 days, by dehydrating municipal sludge to 55-60% simultaneously.
High temperature anaerobic methanobacteria can carry out anaerobic digestion to the organism in mud at short notice, by being converted into methane gas to the digestion of organic carbon, be used after collection, not only reach the reproducible utilization of the energy, minimizing and preliminary harmless treatment can also be carried out to mud, enable the mud decrement 30%-40% after process;
Thiobacillus thiooxidant is by the Fast-propagation in mud, and the indirect action of direct effect or its meta-bolites, by oxidation, reduction, complexing, absorption, dissolution process, is separated lixiviate out by the insoluble heavy metal in mud.And by adding sulphur powder, the overall pH value of mud can not only be adjusted, the growing environment that thiobacillus thiooxidant is suitable is provided, nutritive substance can also be provided for the rapid breeding of thiobacillus thiooxidant, to ensure the nutrition energy of its Fast-propagation.
When thiobacillus thiooxidant bacterial content is too low, in mud, Fast-propagation is slow, the growth and breeding time is long, reduce the removal efficiency to sludge heavy-metal, and bacterial content is excessive, easily causes the supersaturation of bacterial content, short period of time consumes the element sulphur of limitation in a large number, affect the Periodical Reproduction of thiobacillus thiooxidant in mud, cause the too early decline of microbial inoculum, affect the processing efficiency to mud.Verified by pre-stage test, thiobacillus thiooxidant bacterial content is comparatively suitable at 20-30 hundred million/L.
Preferably, the temperature of described high-temperature anaerobic fermentation is 55-60 DEG C, and the cycle is 7-10 days.
Under 55-60 DEG C of high-temperature anaerobic fermentation environment, greatly can improve the vital movement of methanobacteria, to the organic mass-energy Degradation and Transformation fast in mud, and the productive rate of methane gas is higher.If temperature is too low, then affect the Metabolic activity of methanobacteria, cause organic consumption in mud too low, methane yield productive rate is low; If temperature is too high, not only cause the too early decline of methanobacteria, and also higher to the process control cost of high-temperature technology, therefore preferably at the temperature of 55-60 DEG C, anaerobic digestion disposal is carried out to mud.
When 55-60 DEG C, at anaerobic digestion 7-10 days, in mud, organic rate of consumption is maximum, exceeding this treatment cycle (﹥ 10 days), in mud, organic consumption and methane production do not have prolongation in time and increase, and the treatment time too short (﹤ 7 days), the degraded of the organic matter of mud and methane content also do not reach maximum value, therefore, preferably the anaerobic digestion cycle is selected to be 7-10 days.
Preferably, the add-on of described high temperature anaerobic methanobacteria bacterium liquid is the 0.3-0.5% of municipal sludge quality.
When adding methanobacteria bacterial content and being too low (﹤ 0.3%), in mud, Fast-propagation is slow, and the growth and breeding time is long, reduce to the efficiency of mud organic matter and methane gas output too low, extend the digestion time to mud; And bacterial content too high (﹥ 0.5%), easily cause the supersaturation of bacterial content, the Fast-propagation decline of the methanobacteria that the short period of time is a large amount of, cause middle and later periods bacterial content low, affect the digestion to mud and methane yield, verified by pre-stage test, the methanobacteria adding the 0.3-0.5% of sludge quantity in mud is also comparatively suitable.
Preferably, in step (4), the add-on of thiobacillus thiooxidant enrichment bacterium liquid is the 0.3-0.5% of sludge quality.
When adding sulfur oxide bacterial content and being too low (﹤ 0.3%), in mud, Fast-propagation is slow, and the growth and breeding time is long, and need could build the parsing of a comparatively suitable sour environment and heavy metal for a long time; And bacterial content excessive (﹥ 0.5%), easily cause the supersaturation of bacterial content, the Fast-propagation decline of the thiobacillus thiooxidant that the short period of time is a large amount of, cause middle and later periods bacterial content low, the parsing of impact to the heavy metal in mud, verified by pre-stage test, the thiobacillus thiooxidant adding the 0.3-0.5% of sludge quantity in mud is also comparatively suitable.
Preferably, in step (4), the add-on of sulphur powder is the 0.1-0.2% of mud weight.
Compare, add sulphur powder too low (﹤ 0.1%), can not the acid or alkali environment effectively in conditioning of mud and the element sulphur needed for supplemental thiobacillus vital metabolic, and add sulphur powder too much (﹥ 0.2%), not only cause the sulphur in mud saturated, cause sulphur to suppress, affect the growth and breeding of thiobacillus thiooxidant, and potential of hydrogen is on the low side in mud environment, be unfavorable for the growth metabolism of thiobacillus thiooxidant equally.
Preferably, the concrete steps that described high temperature anaerobic methanobacteria expands numerous cultivation are: at absolute anaerobic environment, temperature 55 DEG C, triangular flask activation 68h-72h is carried out to high temperature anaerobic methanobacteria, 120L seed tank culture 72h-78h and 10 ton of large tank spreads cultivation and produces 62h-70h, complete the production of third stage culture microbial inoculum, obtain methanobacteria liquid.
Preferably, the concrete steps that described thiobacillus thiooxidant expands numerous cultivation are: at logical oxygen environment, temperature 30 DEG C, carry out triangular flask activation, seed tank culture and large tank and produce third stage culture, produce thiobacillus thiooxidant bacterium liquid to thiobacillus thiooxidant;
Wherein, thiobacillus thiooxidant activation medium is: NH
4cl 1.0g/L, NaCl 1.0g/L, K
2hPO
40.5g/L, MgCl
20.7g/L, CaCl
20.15g/L, sulphur powder 10g/L, join thiobacillus thiooxidant bacterial classification in aforesaid liquid substratum, cultivate 3-5 days at 150r/min, at 30 DEG C, get its supernatant liquor 10-20ml, be transferred in above-mentioned activation medium and cultivate again, transfer three times by identical method, complete actication of culture;
Bacterial classification expands breeding culture medium: Sulfothiorine 0.5g/L, sulphur powder 6g/L, dregs of beans 0.05g/L, fish meal 0.02 g/L, expand numerous according to above-mentioned substratum to the bacterial classification that bacterial classification carries out seeding tank and large tank, culture condition is venting pressure 0.05Mp, cultivates 3-5 days at 30 DEG C, and the expansion namely completing seed is numerous.
Preferably, described municipal sludge comprises urban industry mud and municipal sludge.
Because in municipal sludge, comparatively urban industry Of Heavy Metal Level In Sludge is low, therefore, applying municipal sludge clean utilization method of the present invention can more effectively purify municipal sludge, and the Nutrition Soil obtained after purification can be used for afforestation etc.
Preferably, described heavy metals in city sewage sludge content does not exceed national agricultural standards regulation heavy metal limit value 5 times.
Second object of the present invention is to provide the fertilizer that application aforesaid method prepares.
The method of municipal sludge clean utilization of the present invention can the process municipal sludge of mass-producing.By the method for municipal sludge clean utilization of the present invention, not only save municipal sludge process energy consumption, expense and shortened treatment cycle, and in treating processes, completely avoid the secondary pollution to environment, accomplished again the utilization of the energy and manure resources simultaneously, conscientiously the clean utilization of municipal sludge has been accomplished, environmental protection.
By the method for municipal sludge clean utilization of the present invention, can manufacture biogas in the anaerobic digestion stage; After Sulfobacillus process removes heavy metal, mud can be made fully to become thoroughly decomposed, simultaneously do not exceed under national agricultural standards specifies the ambit of heavy metal limit value 5 times for urban industry mud at heavy metal content, heavy metal removing is respond well, decreasing ratio can reach 90% ~ 95%, and industrial sludge after treatment can meet the agricultural requirement of mud completely.
Apply the purposes scope that method of the present invention expands urban industry mud, improve the utilization ratio of urban industry mud, effectively improve the stabilization of urban industry mud, minimizing, innoxious and resource utilization degree, reach the object of clean utilization.Meanwhile, method of the present invention can eliminate a series of environmental pollution such as air, earth's surface, water body that municipal sludge brings environment completely.
Embodiment
Following embodiment is convenient to understand the present invention better, but does not limit the present invention.Experimental technique in following embodiment, if no special instructions, is ordinary method.Test materials used in following embodiment, if no special instructions, is commercially available.
Sarcina methanica (
methanosarcinales.YN-10) original strain is purchased from methane engineering technology research centre, Yunnan.
The original strain of thiobacillus thiooxidant Thiobacillus Thiooxidans, T.t-01 is purchased from Chemistry and Chemical Engineering College of Shihezi Univ.
embodiment 1
Xinjiang municipal sewage plant can produce the urban industry mud of 150 tons (water content 80%) every day, in mud, pollutent index cadmium (Cd), mercury (Hg), copper (Cu), zinc (Zn) exceed standard 1 ~ 4 times, and plumbous (Pb), boron (B), nickel (Ni), cadmium (Cr) and arsenic (As) are in agricultural sludge pollutant catabolic gene standard (GB4284-84).
1, to high temperature anaerobic methanobacteria sarcina methanica (
methanosarcinales.YN-10) carry out three grades and expand numerous cultivation: at absolute anaerobic environment, temperature 55 DEG C, triangular flask activation 68h-72h is carried out to high temperature anaerobic methanobacteria, 120L seed tank culture 72h-78h and 10 ton of large tank spreads cultivation and produces 62h-70h, completes the production of third stage culture microbial inoculum, obtains methanobacteria liquid.Consider that adaptation, the growth cycle of methanobacteria are long, be that the industrial molasses mixing of 5% is as high temperature anaerobic methanobacteria expansion breeding culture medium using urban industry mud leach liquor and mass percent, methanobacteria seed liquor is made to be transferred in mud, amplification can be bred rapidly, improve sludge anaerobic treatment rate.
2, when sarcina methanica growth logarithmic phase, stop seed culture process, it can be used as seed to be inoculated in mud: the sarcina methanica seed liquor of the mud companion sludge quality 0.5% above-mentioned mud factory produced by sludge pump is transported in thermophilic digestion tower.Adopt continuous high temperature anaerobic digestion process, at temperature is 55 DEG C ~ 60 DEG C, by the high-temperature anaerobic fermentation of continuous 7 ~ 10 days, to the fresh mud that sewage work produces every day, carry out anaerobic ferment for methane.By mud feed pressure, mud self-digestion tower bottom rises to top, flows out from top exit.Mud is 7 ~ 10 days in digestion tower dwell period, is an anaerobically fermenting cycle of mud.At the digestion top of tower design collecting methane mouth higher than digestion excess sludge exit, collect the biogas in digestion tower, carry out compression and store for future use;
By this thermophilic digestion process, in mud, organic matter can reduce by 30% ~ 40%, and the pathogenic bacteria can killed in mud and weed seed, simultaneously by the biogas of anaerobic digestion manufacture, can be used as clean energy and utilize, replace the consumption of the part energy.
3, to thiobacillus thiooxidant
thiobacillus Thiooxidans, T.t-01 bacterial classification carries out three grades and expands numerous cultivation: at logical oxygen environment, temperature 30 DEG C, carries out triangular flask activation, 120L seed tank culture and 10 tons of large tanks and produces third stage culture, produce thiobacillus thiooxidant bacterium liquid to thiobacillus thiooxidant.Wherein, thiobacillus thiooxidant activation medium is: NH
4cl 1.0g/L, NaCl 1.0g/L, K
2hPO
40.5g/L, MgCl
20.7g/L, CaCl
20.15g/L, sulphur powder 10g/L, join thiobacillus thiooxidant bacterial classification in aforesaid liquid substratum, 3-5 days is cultivated at 150r/min, at 30 DEG C, get its supernatant liquor 10-20ml, be transferred in above-mentioned 100ml activation medium and cultivate, transferring by identical method three times can be complete to actication of culture.Bacterial classification expands breeding culture medium: Sulfothiorine 0.5g/L, sulphur powder 6g/L, dregs of beans 0.05g/L, fish meal 0.02g/L.Expand numerous according to above-mentioned substratum to the bacterial classification that bacterial classification carries out 120L and 10 ton of large tank, culture condition is venting pressure 0.05MPa, cultivates 3-5 days at 30 DEG C, and the expansion namely completing seed is numerous.
4, when flora number reaches 20 ~ 3,000,000,000/L in thiobacillus thiooxidant enrichment bacterium liquid, namely can be used as mud and add the use of enrichment bacterium liquid.Add the thiobacillus thiooxidant enrichment bacterium liquid of sludge quality 0.5% at anaerobic digestion excess sludge, and add the sulphur powder of 0.15% according to mud part by weight, Homogeneous phase mixing, regulate material pH to be 3 ~ 5.At 30 DEG C after the cultured continuously of 3 ~ 5 days, to municipal sludge carry out mechanical dehydration to 55% ~ 60%.The quality of dehydrated sludge is 75 tons-80 tons.
Carry out detection to the resource utilization degree in the urban industry sludge handling process of above-mentioned sewage work and after process and each pollutent standard to analyze, concrete outcome is as shown in table 1.
Physical and chemical index before and after table 1 municipal sludge clean utilization process
。
Municipal sludge can be become thoroughly decomposed completely through above-mentioned steps.Municipal sludge after dehydration is added in organic dry auxiliary material and after, agricultural requirement can be met completely, afforestation, agricultural etc. can be done; The moisture removed municipal sludge adds alkali regulates liquid pH heavy metal sedimentation through chemical process or removes heavy metal wherein by electrochemical method electrolysis.
5, by dehydration after mud again drying make moisture lower than 30%, carrying out screening packing to dewatered sludge can prepare organic fertilizer.Agricultural etc. for afforestation, be used as base manure in the fall, every mu of consumption 1 ton-1.5 tons, can improve the soil organism, improvement Soil structure preferably.
Fertilizer below for adopting aforesaid method to prepare is tested afforestation soil improvement.
Be experimental field North one, high and new technology industrial development zone, Urumchi tree-lined streets, carry out the fertilizer improved experimental of continuous 2 years (2012 and 2013).Test arranges three process, and wherein process a fertilizer produced for the present invention, one is treated to sheep excrement, and one is treated to contrast.Concrete fertilizing method is as follows:
The bio-fertilizer 20gk ∕ strain that process one, XinJiang TianWu Science Development Co., Ltd produce;
Process two, 30kg Yang Fen ∕ strain;
Process three, do not apply fertilizer.
After soil improvement in continuous 2 years test, the soil property situation in 2013.9 pairs of tree-lined streets carries out index determining, and result is as shown in following table (table 2):
table 2 afforestation Soil Characteristic Analysis result
。
Known to the detection analytical results of soil from table, use the content that fertilizer that this patent produces can significantly improve organic matter in soil, nitrogen, phosphorus, potassium, compare and use sheep excrement and control group soil, have significant difference to the improvement situation of soil.
embodiment 2
The present embodiment carries out clean utilization to municipal sludge, and method is identical with embodiment 1.The heavy metal contained in municipal sludge is comparatively few a lot, therefore, better by the effect of the method process municipal sludge in urban industry mud.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for municipal sludge clean utilization is after municipal sludge is carried out high-temperature anaerobic fermentation, adds thiobacillus thiooxidant enrichment bacterium liquid and cultivates, finally, by dehydrating municipal sludge.
2. method according to claim 1, is characterized in that: step is as follows: (1) is carried out three grades to high temperature anaerobic methanobacteria and expanded numerous cultivation;
(2) by expand numerous after be in growth logarithmic phase high temperature anaerobic methanobacteria bacterium liquid add in municipal sludge, carry out high-temperature anaerobic fermentation;
(3) three grades are carried out to thiobacillus thiooxidant and expand numerous cultivation, obtain thiobacillus thiooxidant enrichment bacterium liquid;
(4) when flora number reaches 20-30 hundred million/L in thiobacillus thiooxidant enrichment bacterium liquid, added in the mud after step (2) fermentation, added sulphur powder, after cultured continuously 3-5 days, by dehydrating municipal sludge to 55-60% simultaneously.
3. method according to claim 1 and 2, is characterized in that: the temperature of described high-temperature anaerobic fermentation is 55-60 DEG C, and the cycle is 7-10 days.
4. method according to claim 2, is characterized in that: the add-on of described high temperature anaerobic methanobacteria bacterium liquid is the 0.3-0.5% of municipal sludge quality.
5. method according to claim 2, is characterized in that: in step (4), the add-on of thiobacillus thiooxidant enrichment bacterium liquid is the 0.3-0.5% of sludge quality.
6. method according to claim 2, is characterized in that: in step (4), the add-on of sulphur powder is for adding 0.1-0.2% according to mud weight.
7. method according to claim 2, it is characterized in that: the concrete steps that described high temperature anaerobic methanobacteria expands numerous cultivation are: at absolute anaerobic environment, temperature 55 DEG C, triangular flask activation 68h-72h is carried out to high temperature anaerobic methanobacteria, 120L seed tank culture 72h-78h and 10 ton of large tank spreads cultivation and produces 62h-70h, complete the production of third stage culture microbial inoculum, obtain methanobacteria liquid.
8. method according to claim 2, it is characterized in that: the concrete steps that described thiobacillus thiooxidant expands numerous cultivation are: at logical oxygen environment, temperature 30 DEG C, triangular flask activation, seed tank culture and large tank are carried out to thiobacillus thiooxidant and produces third stage culture, produce thiobacillus thiooxidant bacterium liquid;
Wherein, thiobacillus thiooxidant activation medium is: NH
4cl 1.0g/L, NaCl 1.0g/L, K
2hPO
40.5g/L, MgCl
20.7g/L, CaCl
20.15g/L, sulphur powder 10g/L, join thiobacillus thiooxidant bacterial classification in aforesaid liquid substratum, cultivate 3-5 days at 150r/min, at 30 DEG C, get its supernatant liquor 10-20ml, be transferred in above-mentioned activation medium and cultivate again, transfer three times by identical method, complete actication of culture;
Bacterial classification expands breeding culture medium: Sulfothiorine 0.5g/L, sulphur powder 6g/L, dregs of beans 0.05g/L, fish meal 0.02 g/L, expand numerous according to above-mentioned substratum to the bacterial classification that bacterial classification carries out seeding tank and large tank, culture condition is venting pressure 0.05Mp, cultivates 3-5 days at 30 DEG C, and the expansion namely completing seed is numerous.
9., according to the arbitrary described method of claim 1-8, it is characterized in that: described municipal sludge comprises urban industry mud and municipal sludge.
10. application rights requires the fertilizer that the method described in 1-9 prepares.
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| CN107500852A (en) * | 2017-08-05 | 2017-12-22 | 周维民 | One kind targeting removing heavy metals source (functional) organic fertilizer |
| CN110526532A (en) * | 2019-09-26 | 2019-12-03 | 山东大学 | Utilize the innoxious method with minimizing processing sludge preparation gardens fertilizer of microorganism |
| CN110526532B (en) * | 2019-09-26 | 2021-08-10 | 山东大学 | Method for preparing garden fertilizer by utilizing harmless and reduction treatment sludge of microorganisms |
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